EP1006927B1 - Systeme d'implant dentaire ou orthopedique perfectionne - Google Patents

Systeme d'implant dentaire ou orthopedique perfectionne Download PDF

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Publication number
EP1006927B1
EP1006927B1 EP98903689.2A EP98903689A EP1006927B1 EP 1006927 B1 EP1006927 B1 EP 1006927B1 EP 98903689 A EP98903689 A EP 98903689A EP 1006927 B1 EP1006927 B1 EP 1006927B1
Authority
EP
European Patent Office
Prior art keywords
implant
face
epithelial
shoulder
stop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98903689.2A
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German (de)
English (en)
Other versions
EP1006927A4 (fr
EP1006927A1 (fr
Inventor
Vincent J. Morgan
Thomas D. Driskell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Debbie LLC
Original Assignee
Debbie LLC
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Filing date
Publication date
Application filed by Debbie LLC filed Critical Debbie LLC
Publication of EP1006927A1 publication Critical patent/EP1006927A1/fr
Publication of EP1006927A4 publication Critical patent/EP1006927A4/fr
Application granted granted Critical
Publication of EP1006927B1 publication Critical patent/EP1006927B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0069—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection
    • A61C8/0071—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection with a self-locking taper, e.g. morse taper
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape

Definitions

  • This invention relates generally to restorative dentistry and more particularly to improved dental implant systems.
  • Natural teeth may be lost as a result of dental disease or trauma making it desirable for replacement with prosthetic devices.
  • One type of prosthetic device is a dental implant or root member which is surgically positioned within the mandibular or maxillary alveolar bone. After healing a head member or abutment is mounted on the implant and then, in turn, a tooth-simulating prosthesis, or crown, is mounted on the abutment.
  • a bore having a diameter generally the same as the diameter of the implant is drilled in the aveolar bone.
  • the implant is positioned in the bore and, for an implant type positioned below the surface of the bone, is packed with autogenous graft material, such as bone particles harvested during the drilling procedure.
  • the implant is provided with an abutment receiving bore which is closed with a temporary healing plug and the site is covered and allowed to heal for a suitable period of time, e.g., 3-6 months to allow for osseointegration with the bone and the implant forming essentially a unitary body.
  • the temporary healing plug is surgically accessed and removed.
  • a permanent abutment having a post portion receivable in the bore of the implant is then mounted on the implant.
  • the abutment is threadingly attached to the implant.
  • the screw threads are manufactured with very tight tolerances to minimize any looseness there is inherently a certain amount of micro-motion between the screw portion and the threaded bore of the implant to enable the screw to be screwed into the implant. This micro-motion and bacterial leakage between the components cause bone cratering and soft tissue attachment migration leading to further deterioration.
  • Another dental implant system utilizes an abutment having a post formed with a locking or self-holding taper which is received in the bore of the implant which is formed with a matching locking taper.
  • a system of this type is shown and described in co-assigned U.S. Pat. No. 4,738,623 .
  • an implant is shown having multiple, outwardly extending fins formed on the lower portion thereof and has a narrowed upwardly and inwardly contoured shoulder formed above the fins.
  • an object of the present invention to provide a dental implant system which overcomes the above noted limitations of the prior art.
  • the invention provides an implant as claimed in claim 1.
  • a dental implant comprises a body formed of biocompatible material having an abutment receiving bore extending from a crestal end along a longitudinal axis toward a distal end.
  • the implant includes at least one epithelial stop comprising an annular surface circumscribing the body.
  • One selected location for an epithelial stop is shown located intermediate the ends of a frustoconical shoulder formed between the outer side wall of the implant and the crestal end face of the implant.
  • the epithelial stops are particularly advantageous for use with abutments having threaded means coupling the implant and abutment which tend to be subject to micro-motion but can also be used with locking taper coupling means.
  • Implant 10 is composed of biocompatible material such as titanium or a titanium alloy having a generally cylindrical body and is formed with a closed ended bore 12 having a locking taper extending from a crestal end face 14 along a longitudinal axis 16 toward an opposite distal end face 18.
  • a narrow rim 22 may be provided at the crestal end between bore 12 and shoulder 19.
  • Main body portion 20 is shown provided with a surface configuration which promotes osseointegration comprising a plurality of laterally extending fins 24. If desired, some or all the fins may be provided with one of more slots 30 to inhibit relative rotation of implant 10 in the aveolar bone.
  • Main body portion 20, including fins 24, preferably has a slightly decreasing diameter towards distal end face 18.
  • Epithelial migration tends to follow surfaces inwardly toward the center of an opening and away from a crestal end of the opening and, as mentioned above, in the case of an implant, can cause loss of bone supporting the implant.
  • an epithelial stop is provided to limit such migration.
  • groove 32 circumscribes shoulder 19 intermediate its upper and lower extremities and comprises an annular surface portion 32a which forms a sharp angle with shoulder 19, e.g., a right or acute angle and annular surface 32b which forms an acute angle with surface 32a.
  • This surface 32a extends in a direction which is both outwardly away from the center (longitudinal axis 16) and upwardly away from distal end 18 when compared to the direction in which epithelium would migrate from crestal end 14 down shoulder 19.
  • To be effective as an epithelial stop surface 32a should extend at least 25.4 micron (0.001 inch) and preferably at least 127 micron (0.005 inch). As mentioned supra, in most cases in a locking taper system, even without the epithelial stop, migration is limited to the upper portion of shoulder 19. However, epithelial stop 32 serves to prevent further migration in extreme cases, such as those mentioned above relating to systemic problems.
  • FIG. 4 an implant 100 is shown which has first and second epithelial stops 32, the first stop comprises a frustoconical surface 32a extending from bore 112 outwardly and upwardly toward crestal end 114.
  • the first stop comprises a frustoconical surface 32a extending from bore 112 outwardly and upwardly toward crestal end 114.
  • a second stop or groove 32 is located between shoulder 119 and the closest fin 124 to the crestal end face 114.
  • Groove 32 of the second stop has a frustoconical surface 32a extending toward the crestal end face in the direction of arrow 134 and outwardly away from the center as shown in Fig. 4a in the same manner as surface 32a of Fig. 1a and surface 32a in Fig. 4 extending from bore 112 or it can take the form of a compound surface such as a square groove as shown in Fig. 4b .
  • the epithelial stop 32' is a square groove with a first surface 32c extending radially outwardly and a second cylindrical surface 32d extending in a direction from distal end face 118 toward crestal end face 114, i.e., in the direction of arrow 134.
  • first surface 32c and second surface 32d should extend at least approximately 25.4 micron (0.001 inch), and preferably 127 micron (0.005 inch), radially outwardly and longitudinally respectively.
  • implant 10' comprises the same structure as Fig. 1 except for the abutment receiving bore 12' which in Fig. 3 is shown to be threaded for reception of a threaded portion of an abutment.
  • the epithelial stop is particularly useful in view of the greater potential for migration due to the micro-motion between the abutment and implant members inherent in a threaded system as mentioned above.
  • abutment 140 comprises a post portion 142 having a locking taper matching that of bore 12 of implant 10 extending down from a base 144, the lower portion of which is shaped generally as a portion of a sphere.
  • the upper portion 146 of base 144 serves to receive a prosthesis and is preferably provided with an anti -rotational configuration such as opposed flats 148.
  • post 142 is provided with a slight chamfer 142a to faclitate placement of post 142 in bore 12.
  • Fig. 9 shows a corresponding abutment 140' having a threaded post 142' adapted for use with threaded bore 12' of implant 10' ( Fig.3 ) but is otherwise identical therewith.
  • the typical implant has a relatively high length to diameter, or width, ratio thereby providing effective resistance to lateral loading.
  • Such ratios typically are on the order of 2:1 or higher.
  • a currently available family of implants includes a small diameter of 3.5mm, an intermediate diameter of 4mm and a large diameter of 5mm and having lengths of 8mm, 11mm or 14mm, as desired.
  • the corresponding length to width ratios range from a low of 1.6:1 to a high of 4.0:1.
  • Implant 100 having a locking taper abutment receiving bore 112 and implant 100' having a threaded abutment receiving bore 112' are made wider than conventional implants with the diameter of post 142, 142' of the corresponding abutment also being increased, for example, from 2mm to 3mm.
  • a typical width, or diameter, w shown in Fig. 4 is approximately 6mm and the length or height 1 being any one of several lengths useful for different individuals.
  • a family of posterior implants includes a short length of 6mm, a medium length of 6.75mm and a long length of 8.25mm resulting in ratios of 1:1,1.25:1 and 1.375:1, repectively.
  • the length to width ratio of implants is no greater than approximately 1.5:1.
  • the squat configuration of the implant whose lower outer surface approximates a spherical configuration, provides improved resistance to lateral loading.
  • a load bearing groove 126 formed in the bottom or distal end face 118 of implants 100, 100'. Any lateral load applied to the implant through an abutment mounted in bore 112, 112', due to the squat configuration, will be distributed in compression and tension components all along the outer surface by means of fins 124 abetted by groove 126 in the distal end face 118.
  • Figs. 1,3 , 4 ,and 6 are shown in Figs. 1,3 , 4 ,and 6 as the primary mechanism to promote osseointegration
  • the outer surface could also be formed with a plurality of preferably evenly spaced dimples 250 shown in implant 200 in Fig. 10 having a depth of at least approximately 127 micron (0.005 inch) with or without a suitable coating of hydroxyapatite or the like to further promote osseointegration.
  • Bore 212 is shown as a locking taper however the dimpled surface could be used with virtually any type of implant system including those employing threaded coupling members.
  • Figs. 11-13 show additional modified implants of the Figs. 4-6 implants. In Fig.
  • implant 300 is shown which is essentially spherical to optimize distribution in any direction of any lateral loading from an implant.
  • Implant 300 is shown with an outer surface having a coating 302 of suitable osseointegration promoting material such as hydroxyapatite although it will be understood that any suitable osseointegration promoting surface can be employed.
  • suitable osseointegration promoting material such as hydroxyapatite although it will be understood that any suitable osseointegration promoting surface can be employed.
  • Various curved configurations, both symmetrical and asymmetrical can be utilized to derive the benefit of improved distribution of lateral loading such as implant 400 of Figs. 12 and 13 which has a generally ellipsoidal configuration. The intersection of a plane drawn perpendicular to longitudinal axis 16 and implant 400 forms an ellipse, as seen in Fig.
  • one or more epithelial stops 32, 32' may be provided to limit epithelial migration in the same manner as described previously.
  • the ratio of depth to width should be sufficient to provide the desired lateral force distribution resulting from the curved surface.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)
  • Prostheses (AREA)

Claims (3)

  1. Implant (10) pour un corps vivant, comprenant :
    un corps ayant un axe longitudinal (16) et ayant une face d'extrémité de crête (14) et une face d'extrémité distale (18) espacées le long de l'axe (16),
    un alésage de réception de butée (12) formé à travers la face d'extrémité de crête (14) et s'étendant dans le corps le long de l'axe (16) jusqu'à une extrémité fermée,
    l'implant (10) ayant une surface extérieure disposée entre la face d'extrémité de crête (14) et la face d'extrémité distale (18), et au moins un arrêt épithélial comprenant une rainure annulaire (32) circonscrivant le corps et ayant un axe de rotation généralement coïncidant avec l'axe longitudinal (16),
    la rainure annulaire (32) ayant une profondeur d'au moins approximativement 25,4 microns (0,001 pouce), dans lequel le corps est formé avec un épaulement généralement tronconique (19) ayant une surface lisse s'étendant d'une extrémité supérieure sur la face d'extrémité de crête (14) jusqu'à une extrémité inférieure et la rainure annulaire (32) de l'au moins un arrêt épithélial est située sur l'épaulement (19) entre les extrémités supérieure et inférieure de celui-ci,
    caractérisé en ce que la rainure annulaire (32) de l'au moins un arrêt épithélial comprend une première surface annulaire (32a) qui forme un angle d'approximativement 90 degrés avec l'épaulement (19) et une seconde surface annulaire (32b) qui forme un angle aigu avec la première surface annulaire.
  2. Implant selon l'une quelconque des revendications précédentes, comprenant en outre des moyens de retenue formés sur la surface extérieure pour faciliter une ostéo-intégration, dans lequel les moyens de retenue incluent une pluralité d'ailettes (24) s'étendant vers l'extérieur à partir du corps entre l'épaulement (19) et la face d'extrémité distale (18).
  3. Implant selon l'une quelconque des revendications précédentes, dans lequel les moyens de retenue comprennent en outre une pluralité de creux généralement espacés uniformément dans la surface extérieure ayant une profondeur d'au moins environ 25 microns.
EP98903689.2A 1997-02-11 1998-01-26 Systeme d'implant dentaire ou orthopedique perfectionne Expired - Lifetime EP1006927B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US3754097P 1997-02-11 1997-02-11
US37540P 1997-02-11
PCT/US1998/001353 WO1998034562A1 (fr) 1997-02-11 1998-01-26 Systeme d'implant dentaire ou orthopedique perfectionne

Publications (3)

Publication Number Publication Date
EP1006927A1 EP1006927A1 (fr) 2000-06-14
EP1006927A4 EP1006927A4 (fr) 2006-08-23
EP1006927B1 true EP1006927B1 (fr) 2013-04-10

Family

ID=21894885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98903689.2A Expired - Lifetime EP1006927B1 (fr) 1997-02-11 1998-01-26 Systeme d'implant dentaire ou orthopedique perfectionne

Country Status (5)

Country Link
US (1) US6227857B1 (fr)
EP (1) EP1006927B1 (fr)
JP (2) JP4112629B2 (fr)
AU (1) AU6039398A (fr)
WO (1) WO1998034562A1 (fr)

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FR2814058B1 (fr) * 2000-09-19 2005-10-28 Guy Gabriel Peltier Jeu d'implants et implants correspondants
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SE526746C2 (sv) * 2003-12-11 2005-11-01 Nobel Biocare Ab Implantat applicerbart i tandben med tillhörande mjukvävnad
US8814567B2 (en) 2005-05-26 2014-08-26 Zimmer Dental, Inc. Dental implant prosthetic device with improved osseointegration and esthetic features
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US8758012B2 (en) * 2008-07-14 2014-06-24 Nobel Biocare Services Ag Compact dental implant
EP2145600A1 (fr) * 2008-07-14 2010-01-20 Nobel Biocare Services AG Appareil amélioré d'implants dentaires en deux parties
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US9566136B2 (en) * 2009-12-11 2017-02-14 Rex Implants, Llc Endosseous dental implant
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JP5512626B2 (ja) * 2011-10-03 2014-06-04 ワイ．エス．ハング ウィリアム 歯科インプラント
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US9452032B2 (en) 2012-01-23 2016-09-27 Biomet 3I, Llc Soft tissue preservation temporary (shell) immediate-implant abutment with biological active surface
US9089382B2 (en) 2012-01-23 2015-07-28 Biomet 3I, Llc Method and apparatus for recording spatial gingival soft tissue relationship to implant placement within alveolar bone for immediate-implant placement
KR101457012B1 (ko) * 2012-04-06 2014-11-04 오상훈 치과용 임플란트 고정구의 설치 방법
ITTE20130001A1 (it) * 2013-02-27 2014-08-28 Claudio Agostinelli Sistema implantare endosseo di grandi dimensioni, extra, fuori standard, in titanio.
ITPD20130184A1 (it) * 2013-07-01 2015-01-02 Stefano Sivolella Impianto dentale endosseo
JP5553293B1 (ja) * 2014-01-21 2014-07-16 優一郎 河原 歯科用インプラント
IL230833A0 (en) * 2014-02-05 2014-09-30 Ophir Fromovich bone graft
US9700390B2 (en) 2014-08-22 2017-07-11 Biomet 3I, Llc Soft-tissue preservation arrangement and method
BR102014031426B1 (pt) 2014-12-15 2018-07-24 Jjgc Ind E Comercio De Materiais Dentarios S/A implante
USD816841S1 (en) 2014-12-15 2018-05-01 Jjgc Industria E Comercio De Materiais Dentarios S/A Bone implant
WO2016144970A1 (fr) 2015-03-09 2016-09-15 Chu Stephen J Pontique ovoïde gingival et ses procédés d'utilisation
CN105726146A (zh) * 2016-04-05 2016-07-06 苏州雅微医疗科技有限公司 牙周病用种植体及其制备方法
BR102016010184B1 (pt) 2016-05-05 2020-10-27 Jjgc Indústria E Comércio De Materiais Dentários S.A. conjunto protético e processo para produção do mesmo
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KR102259790B1 (ko) * 2020-06-02 2021-06-03 주식회사 위드웰임플란트 치과용 임플란트 픽스쳐

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Also Published As

Publication number Publication date
JP2002508676A (ja) 2002-03-19
JP4112629B2 (ja) 2008-07-02
EP1006927A4 (fr) 2006-08-23
JP4387425B2 (ja) 2009-12-16
AU6039398A (en) 1998-08-26
WO1998034562A1 (fr) 1998-08-13
EP1006927A1 (fr) 2000-06-14
US6227857B1 (en) 2001-05-08
JP2007229521A (ja) 2007-09-13

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